Augh these two... My best friend in grade 6 was Pinkie to my Twilight, part of why this is my OTP. :,D Nostalgia aside, I think they're really adorable and that they complement each other, Twi being a down to earth bookworm and Pinkie an airheaded partier.

I've mostly seen it in a few of the shipping groups I've journeyed through. I cannot for the life of me remember her username. She did a comic that lead to an ask Twixie tumblr account; the art isn't Godly but she just does the couple so well.